Staybridge Suites, Lake Buena Vista. We have stayed there 3 times, and it is very nice.
It is right at the enterance of Down Town Disney, so you are very close to Disney property. We get the 2 bedroom, 2 bathroom suite. One bedroom has a king size bed, and its own bathroom. The other bedroom has 2 full size beds, plus an adjoining bathroom. There is also a fold out couch in the living room. The suite also has its own kitchen.
Staybridge Suites also offers a complimentary continental breakfast. While not huge by any means, it is servicable. Bananas, toast, cereal, and juice. The normal stuff.
There is also a pool and hot tub. No pool slide though.
We have enjoyed all of stays at the Staybridge Suites. I think you should check it out.